Etymologies

Middle English pedagoge, from Old French, from Latin paedagōgus, slave who supervised children and took them to and from school, from Greek paidagōgos : paido-, boy; see pedo-1 + agōgos, leader (from agein, to lead; see ag- in Indo-European roots).

(American Heritage® Dictionary of the English Language, Fourth Edition)

And this is not because teaching is laborious -- though it _is_ laborious, and thankless, too, beyond all other occupations; but because a number and variety of causes, into which we need not inquire, have combined to throw ridicule upon him, who is derisively called the pedagogue -- for most men would rather be shot at, than laughed at.

Villeroy, whom Henry was wont to call the pedagogue of the council, went about sighing dismally, wishing himself dead, and perpetually ejaculating, "Ho! poor France, how much hast thou still to suffer!"

He had been annoyed by his extravagant devotion to Paoli, but then he was something of a military hero; but this tagging at the heels of Dr. Johnson, whom he considered a kind of pedagogue, set his Scotch blood in a ferment.